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•� Sequoia 680 Chesapeake E>nvc Redwood City CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> 1900 Bates Aevenue Sure L Concord,CA 94520 (310) 686 9600 FAX(5 to)686 9689 <br /> Analytical 819 Sinker Avenue Suatc a Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Ground�water�� oiogy Dien�toje�ctb�Chevr�on #9-�i2, racy,'� <br /> 1401 Halyard Drive, Suhe 140 Matrix Soil <br /> West Sacramento, CA 95691 <br /> Atterltlan Jason Fedota QC Sample Goup 5050264,66,69,71,7475, 78-79 Reported May 19, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> A AL E 24-Drnitro- Penta- ti <br /> kona hthene 4-Nitro henol toluene chlorophenol Pyrene <br /> Method: EPA 627D EPA 8270 EPA 8270 EPA 6270 EPA 62;'0 <br /> Analyst: E-Manuel E Manuel E Manuel E Manuel E Manuel <br /> Concentration <br /> Spiked: 3300 ug/kg 3300 ug/kg 3300 ug/kg 330()ug/kg 3300 ug/kg <br /> LCS Batch#: LCS050995 LCS050995 LCS050995 LCS05o995 LCS050995 <br /> Date Prepared: 5/9/95 5/9/95 5/9/95 5/9/95 5/9/95 <br /> Date Analyzed: 5/12/95 5/12/95 5/12/95 5/12/95 5/12/95 <br /> Instrument I.D.#: 1=4 F4 F4 F4 F4 <br /> LCS% <br /> Recovery: 58 61 61 61 52 <br /> Control Limits 47-145 RL-132 39-139 14-176 52-115 <br /> MS/MSD <br /> Batch#: 9505433-01 9505433-01 9505433-01 9505433-01 9505433-01 <br /> Date Prepared. 5/9/95 5/9/95 5/9/95 5/9/95 5/9/95 <br /> Date Analyzed 5/12/95 5/12/95 5/12/95 5/12/95 5/12/95 <br /> Instrument I D #. F4 F4 F4 F4 F4 <br /> Matrix Spike <br /> % Recovery: 52 52 52 42 39 <br /> Matrix Splice <br /> Duplicate% <br /> Recovery- 55 58 55 45 39 <br /> Relative% <br /> Difference 57 11 57 6 9 00 <br /> SEQUOIA ANALYTICAL Please Note <br /> 1The LCS is a control sample of known interferent tree matrix that is analyzed using the same reagents <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects the OC limits for MS/MSDs are advisory only <br /> Linda C Schneider and are not used to accept or refect batch results <br /> Protect Manager Page 2 of 2 <br /> 50502fi4 GRW <16> <br />